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Anni [7]
4 years ago
13

Unit 22. Practice test

Mathematics
1 answer:
OLga [1]4 years ago
5 0

Answer:

D

Step-by-step explanation:

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In a sample of 1000 randomly, selected consumers who had opportunities to send in a rebate claim form after purchasing a product
Alexxx [7]

Answer: =(0.2232,0.2768)

Step-by-step explanation:

The confidence interval for population proportion is given by :-

p\ \pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}

Given : Sample size : n=1000

The proportion of people selected consumers who had opportunities to send in a rebate claim form after purchasing a product said they never did so =\dfrac{250}{1000}=0.25

Significance level : 1-0.95=0.05

Critical value : z_{\alpha/2}=1.96

Now, the 95% confidence Interval for the true proportion of such consumers who never apply for a rebate will be :-

0.25\ \pm (1.96)\sqrt{\dfrac{0.25(1-0.25)}{1000}}\\\\\approx0.25\pm0.0268\\\\=(0.2232,\ 0.2768)

Hence, a confidence Interval for the true proportion of such consumers who never apply for a rebate .

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3 years ago
Solve for x in the hanger below
Eva8 [605]

Answer:

x=3

Step-by-step explanation:

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2 years ago
The scale factor for the reduction is . The length of What is the length of B? B = feet
lord [1]

Answer: 1/5, 5

Step-by-step explanation:

4 0
3 years ago
9 months before march 19 2007
elena-14-01-66 [18.8K]
June 19th 2006 specifically a monday
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83-13 = 70
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Thomas’s mileage is 35 miles
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